Fig 2 -

(A-F), Kaplan-Meier curve showing sexually transmitted infection (STI) incidence between age groups over time (days). Red represents the 18–21 year olds, green the 22–25 year olds and blue the 26–33 year olds. The tables show the number of individuals at risk of acquiring STIs over time. A vertical drop represents an event has occurred and a verticle tick mark on the curves indicate that a participant has been censored at that timepoint. (A) Any STI incidence over time. There were no significant differences between any age groups. (B) Chlamydia trachomatis (CT) incidence over time. There was a significant difference between 18–21 and 26–33 year olds (p = 0.049). (C) Neisseria gonorrhoeae (NG) incidence over time. There were no significant differences between any age groups. (D) Trichomonas vagnalis (TV) incidence over time. There was a signigficant difference between the 18–21 and 26–33 year olds (p = 0.011*). (E) Mycoplasma genitalium (MG) incidence over time. There were no significant differences between any age groups. (F) Multiple STI incidence over time. There were no significant differences between age groups. *p<0.05 following Bonferroni correction was considered statistically significant.